Tissue specimen or foreign matter grabbing device

Abstract

The utility model relates to a tissue specimen or foreign matter grabbing device which comprises an outer tube and an inner tube, the inner tube is arranged in the outer tube, one end of the inner tube is connected with an operation portion, and the other end of the inner tube is connected with a grabbing portion. The grabbing part comprises a plurality of grabbing strips which are arranged in an annular array and tend to expand outwards to form elastic structures, the grabbing strips are of flat structures, an elastic film is arranged between every two adjacent grabbing strips, and no elastic film is arranged between one group of adjacent grabbing strips; the flat-structure grabbing strip is used for clamping and cutting the specimen, and the width of the flat-structure grabbing strip is larger than that of a rope structure to prevent the specimen from being cut and cut; meanwhile, the cut specimen is prevented from being separated from the interiors of the grabbing strips during posture adjustment through the elastic film; the sealing assembly formed by matching the protection rope and the clamping hook assembly is beneficial to closing the opening after the cut specimen enters the plurality of grabbing strips through the opening, so that the heteromorphic cells in the cut specimen are further prevented from falling off from the opening and are prevented from being transferred or planted in other areas.

Description

Technical Field

[0001] The utility model relates to a tissue specimen or foreign body grasping device, belonging to the technical field of medical appliances. Background Art

[0002] During the resection operation, the tissue is removed and taken out. Usually, grasping forceps are used to grasp the resected tissue. If the grasping forceps are used too much, the resected tissue may be torn. In addition, the narrow cavity is not convenient for the large grasping forceps to pass through.

[0003] For example, a Chinese patent published on June 3, 2015 and with patent publication number CN204364096U discloses a foreign body removal device that can be used to remove and collect polyps, foreign bodies, and pathological tissue samples that have been removed from the digestive tract under endoscopy;

[0004] However, in the process of grabbing the resected tissue, due to the thin width of the ring / clip / loop and other components, the resected tissue may be partially cut off, resulting in some tissue or cells remaining in the stomach. Utility Model Content

[0005] The purpose of the utility model is to provide a tissue specimen or foreign body grasping device to solve the problems raised in the above background technology.

[0006] The technical solution of the utility model is as follows:

[0007] A tissue specimen or foreign body grasping device, comprising:

[0008] External pipe;

[0009] An inner tube, the inner tube is placed inside the outer tube, one end of the inner tube is connected to the operating part, and the other end of the inner tube is connected to the grasping part;

[0010] The gripping portion comprises a plurality of gripping strips in an annular array and with elastic structures tending to open outwards. The gripping strips are flat structures, and elastic membranes are arranged between every two adjacent gripping strips. There is a group of adjacent gripping strips where no elastic membrane is arranged between them.

[0011] Preferably, curved grooves are provided at both side edges of the middle portion of the gripping strip.

[0012] Preferably, a receiving cavity is formed on the side wall of the gripping strip, and one side of the elastic membrane is arranged in the receiving cavity.

[0013] Preferably, the same side of two adjacent gripping strips without elastic membranes are both provided with elastic unidirectional membranes.

[0014] A method for using a tissue specimen or foreign body grasping device comprises the following steps:

[0015] The grasping part is placed inside the outer tube to reduce the size;

[0016] The outer tube is connected to the inner tube and the grasping part thereof and is extended into the body through the endoscope;

[0017] The inner tube is pushed to move by the operating part so that the grasping part at the end thereof moves to the outside of the outer tube, the grasping strips in the grasping part are unfolded, and the excised specimen passes between two grasping strips without elastic membranes and enters into the grasping strips in the annular array;

[0018] The operating part is pushed and pulled back and forth for many times to adjust the posture of the excised specimen inside the grasping bars of the plurality of annular arrays so that the length direction of the excised specimen is consistent with the axial direction of the grasping bars of the plurality of annular arrays.

[0019] The utility model has the following beneficial effects:

[0020] A flat structure gripping bar is used to clamp the gastric cancer resection specimen. The width of the flat structure gripping bar is thicker than that of the rope structure to prevent cutting of the gastric cancer resection specimen. At the same time, an elastic membrane is used to prevent the resection specimen from escaping from the inside of several gripping bars during posture adjustment. The one-way structure composed of two elastic one-way membranes does not hinder the entry of the resection specimen and prevents the internal resection specimen from escaping in the opposite direction.

[0021] The bending grooves provided on the two side edges of the flat structured gripping strip are conducive to the bending of the gripping strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the utility model when the grabbing part moves to the outside of the outer tube;

[0024] Figure 3 This is a schematic diagram of the structure of the grab bar of the utility model;

[0025] Figure 4 for Figure 2 Section view in the AA direction;

[0026] Figure 5 This is a schematic diagram of the cooperation of two elastic unidirectional membranes of the utility model.

[0027] The reference numerals in the figure are as follows:

[0028] 100, operating part; 200, outer tube; 300, grabbing part;

[0029] 301, inner tube; 302, gripping strip; 3021, bending groove; 3022, receiving cavity; 303, elastic membrane; 304, elastic unidirectional membrane. DETAILED DESCRIPTION

[0030] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Example: Figure 1-5 As shown:

[0032] External tools are used to endoscopically remove the lesion to form a resection specimen;

[0033] One end of the outer tube 200 is fixedly connected to the fixed part in the operating part 100, and one end of the inner tube 301 is fixedly connected to the movable part in the operating part 100. The movable part slides linearly relative to the fixed part. The other end of the inner tube 301 is connected to the grasping part 300. The inner tube 301 is relatively placed in the outer tube 200, and the inner tube 301 can move and rotate in the outer tube 200.

[0034] The outer tube 200 and the inner portion 301 and the grasping portion 300 therein are introduced into the body through the endoscope.

[0035] like Figure 2-4 As shown, the gripping portion 300 includes four groups of gripping bars 302 in an annular array, the upper ends of the four groups of gripping bars 302 are fixed to the inner tube 301, and the lower ends are connected together; elastic membranes 303 are connected between two adjacent gripping bars 302, and the elastic force of the gripping bars 302 themselves is greater than the elastic force of the elastic membrane 303; a group of two adjacent gripping bars 302 are hollowed out to form an opening; the gripping bars 302 are long strips and flat structures, such as Figure 3 As shown, the gripping strip 302 is bent outward along the dotted line in the middle thereof, and bending grooves 3021 are provided in the middle of the left and right edges of the gripping strip 302 , which facilitate bending of the gripping strip 302 .

[0036] When the four groups of gripping strips 302 extend into the outer tube 200, they are compressed by the outer tube 200 so that the four groups of gripping strips 302 shrink in size. Figure 3 shown.

[0037] The inner tube 301 is pushed and pulled by the operating part 100 to move relatively inside the outer tube 200, so that the gripping part 300 at one end of the inner tube 301 moves to the outside of the outer tube 200 and opens outwards due to the elastic force of the gripping strip 302. Figure 2 , 4 As shown; at this time, the resected specimen can enter the space formed by the four groups of gripping strips 302 through the opening. At this time, the three groups of elastic membranes 303 in the unfolded state will close the openings between the corresponding two adjacent gripping strips 302 to prevent the resected specimen from escaping.

[0038] like Figure 4As shown, a receiving cavity 3022 is opened on the side wall of the gripping strip 302, and the two sides of the elastic membrane 303 are respectively connected to the inner walls of the receiving cavities 3022 of two adjacent gripping strips 302. When the four groups of gripping strips 302 are extended into the outer tube 200, the side walls of the two gripping strips 302 are fitted and abutted against each other, so that when the body size is reduced, the elastic membrane 303 is retracted into the receiving cavity 3022 along with the reduced body size.

[0039] After the resected specimen enters the internal space formed by the four groups of gripping bars 302, since the posture of the resected specimen entering the space formed by the four groups of gripping bars 302 is uncertain and the width of the lumen is limited, it is not easy to remove the resected specimen if the posture of the resected specimen does not match the width of the lumen. Therefore, it is necessary to push and pull the operating part 100 back and forth multiple times to drive the inner tube 301 to move relatively in the outer tube 200, so that the four groups of annular array gripping bars 302 expand and shrink back and forth, thereby driving the resected specimen therein to collide and adjust its direction until the length direction of the resected specimen is roughly consistent with the length extension direction of the inner tube 301 / outer tube 200.

[0040] In another embodiment, an opening is formed between the two gripping strips 302 where no elastic membrane 303 is provided, for the excised specimen to enter. Figure 5 As shown, an elastic one-way membrane 304 is provided on the side wall of the gripping strip 302 of the opening. When the gripping strip 302 is bent and unfolded, a gap is left between the two elastic one-way membranes 304, and the two elastic one-way membranes 304 are equivalent to closing half of the opening. At the same time, due to the bending of the gripping strip 302, the two elastic one-way membranes 304 are not in the same plane but are inclined inward, so that the opening forms a trumpet-like structure, making it easy for the excised specimen to enter but difficult to escape in the reverse direction.

[0041] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A tissue specimen or foreign body grasping device, characterized in that: include; Outer tube (200); An inner tube (301), the inner tube (301) being placed inside the outer tube (200), one end of the inner tube (301) being connected to the operating portion (100), and the other end of the inner tube (301) being connected to the grasping portion (300); The gripping portion (300) comprises a plurality of gripping strips (302) in an annular array and having an elastic structure that tends to open outwards. The gripping strips (302) are flat in structure, and an elastic membrane (303) is arranged between every two adjacent gripping strips (302). There is a group of adjacent gripping strips (302) where no elastic membrane (303) is arranged between them.

2. A tissue specimen or foreign body grasping device as claimed in claim 1, characterized in that: The gripping strip (302) is provided with curved grooves (3021) at both side edges of the middle portion.

3. A tissue specimen or foreign body grasping device as claimed in claim 1, characterized in that: A receiving cavity (3022) is provided on the side wall of the gripping strip (302), and one side of the elastic membrane (303) is arranged in the receiving cavity (3022).

4. A tissue specimen or foreign body grasping device as claimed in claim 1, characterized in that: The same side of two adjacent gripping strips (302) not provided with the elastic membrane (303) is provided with an elastic unidirectional membrane (304).

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